keyword
MENU ▼
Read by QxMD icon Read
search

Crop simulations

keyword
https://www.readbyqxmd.com/read/28338728/characterising-root-trait-variability-in-chickpea-cicer-arietinum-l-germplasm
#1
Yinglong Chen, Michel Edmond Ghanem, Kadambot Hm Siddique
Chickpea (Cicer arietinum L.) is an important grain legume crop but its sustainable production is challenged by predicted climate changes, which are likely to increase production limitations and uncertainty in yields. Characterising the variability in root architectural traits in a core collection of chickpea germplasm will provide the basis for breeding new germplasm with suitable root traits for the efficient acquisition of soil resources and adaptation to drought and other abiotic stresses. This study used a semi-hydroponic phenotyping system for assessing root trait variability across 270 chickpea genotypes...
October 6, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338637/using-an-active-optical-sensor-to-develop-an-optimal-ndvi-dynamic-model-for-high-yield-rice-production-yangtze-china
#2
Xiaojun Liu, Richard B Ferguson, Hengbiao Zheng, Qiang Cao, Yongchao Tian, Weixing Cao, Yan Zhu
The successful development of an optimal canopy vegetation index dynamic model for obtaining higher yield can offer a technical approach for real-time and nondestructive diagnosis of rice (Oryza sativa L) growth and nitrogen (N) nutrition status. In this study, multiple rice cultivars and N treatments of experimental plots were carried out to obtain: normalized difference vegetation index (NDVI), leaf area index (LAI), above-ground dry matter (DM), and grain yield (GY) data. The quantitative relationships between NDVI and these growth indices (e...
March 24, 2017: Sensors
https://www.readbyqxmd.com/read/28334292/the-synergistic-effects-of-almond-protection-fungicides-on-honey-bee-hymenoptera-apidae-forager-survival
#3
Adrian Fisher, Chet Coleman, Clint Hoffmann, Brad Fritz, Juliana Rangel
The honey bee (Apis mellifera L.) contributes ∼$17 billion annually to the United States economy, primarily by pollinating major agricultural crops including almond, which is completely dependent on honey bee pollination for nut set. Almond growers face constant challenges to crop productivity owing to pests and pathogens, which are often controlled with a multitude of agrochemicals. For example, fungicides are often applied in combination with other products to control fungal pathogens during almond bloom...
March 21, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334106/economic-injury-level-and-demography-based-control-timing-projection-of-spodoptera-litura-lepidoptera-noctuidae-at-different-growth-stages-of-arachis-hypogaea
#4
Shu-Jen Tuan, Chung-Chieh Lee, Li-Chen Tang, Pavel Saska
Spodoptera litura (F.), one of the most devastating pests in many Asian countries, is normally controlled by relying on chemical insecticides. To encourage an integrated pest management approach, we determined the economic injury level (EIL) for S. litura on peanut, Arachis hypogaea L., by larval infestation with late instars at different crop growth stages. The cumulative consumption rate of the fifth- and sixth-instars was used as the relative unit for the "Spodoptera injury equivalent" (SIE). The yield of marketable pods significantly decreased from 6...
February 17, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28330557/loss-of-anthocyanins-and-modification-of-the-anthocyanin-profiles-in-grape-berries-of-malbec-and-bonarda-grown-under-high-temperature-conditions
#5
Inés de Rosas, María Teresa Ponce, Emiliano Malovini, Leonor Deis, Bruno Cavagnaro, Pablo Cavagnaro
Malbec and Bonarda are the two most widely cultivated grape varieties in Argentina, and their derived red wines are recognized worldwide, being their intense color a major quality trait. The temperature during fruit ripening conditions berries color intensity. In the main viticulture region of Malbec and Bonarda a 2-3°C increase in temperature has been predicted for the upcoming years as consequence of the global climate change. In the present study, this predicted temperature raise was simulated under field-crop conditions, and its effect on anthocyanin pigmentation in berries of Malbec and Bonarda was monitored by HPLC analysis throughout the ripening process, in two growing seasons...
May 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28324251/simulating-changes-in-cropping-practises-in-conventional-and-glyphosate-tolerant-maize-i-effects-on-weeds
#6
Nathalie Colbach, Alice Fernier, Valérie Le Corre, Antoine Messéan, Henri Darmency
Herbicide-tolerant (HT) crops such as those tolerant to glyphosate simplify weed management and make it more efficient, at least at short-term. Overreliance on the same herbicide though leads to the spread of resistant weeds. Here, the objective was to evaluate, with simulations, the impact on the advent of glyphosate resistance in weeds of modifications in agricultural practises resulting from introducing HT maize into cropping systems. First, we included a single-gene herbicide resistance submodel in the existing multispecific FLORSYS model...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28316108/cry1a-b-16-toxin-from-bacillus-thuringiensis-theoretical-refinement-of-three-dimensional-structure-and-prediction-of-peptides-as-molecular-markers-for-detection-of-genetically-modified-organisms
#7
Alexandra Plácido, Andreia Coelho, Lucas Abreu do Nascimento, Andreanne Gomes Vasconcelos, Maria Fátima Barroso, Joilson Ramos-Jesus, Vladimir Costa, Francisco das Chagas Alves Lima, Cristina Delerue-Matos, Ricardo Martins Ramos, Mariela M Marani, José Roberto de Souza de Almeida Leite
Transgenic maize produced by the insertion of the Cry transgene into its genome became the second most cultivated crop worldwide. Cry gene from Bacillus thuringiensis kurstaki expresses protein derivatives of crystalline endotoxins which confer insect resistance onto the maize crop. Mandatory labeling of processed food containing or made by genetically modified organisms is in force in many countries, so, it is very urgent to develop fast and practical methods for GMO identification, e.g., biosensors. In the absence of an available empirical structure of Cry1A(b)16 protein, a theoretical model was effectively generated, in this work, by homology modeling and molecular dynamics simulations based on two available homologous protein structures...
March 18, 2017: Proteins
https://www.readbyqxmd.com/read/28303353/silicon-alleviates-simulated-acid-rain-stress-of-oryza-sativa-l-seedlings-by-adjusting-physiology-activity-and-mineral-nutrients
#8
Shuming Ju, Liping Wang, Ningning Yin, Dan Li, Yukun Wang, Cuiying Zhang
Silicon (Si) has been a modulator in plants under abiotic stresses, such as acid rain. To understand how silicon made an effect on rice (Oryza sativa L.) exposed to simulated acid rain (SAR) stress, the growth, physiologic activity, and mineral nutrient content in leaves of rice were investigated. The results showed that combined treatments with Si (1.0, 2.0, or 4.0 mM) and SAR (pH 4.0, 3.0, or 2.0) obviously improved the rice growth compared with the single treatment with SAR. Incorporation of Si into SAR treatment decreased malondialdehyde (MDA) content; increased soluble protein and proline contents; promoted CAT, POD, SOD, and APX activity; and maintained the K, Ca, Mg, Fe, Zn, Cu content balance in leaves of rice seedlings under SAR stress...
March 16, 2017: Protoplasma
https://www.readbyqxmd.com/read/28301564/temperature-dependent-phenology-of-plutella-xylostella-lepidoptera-plutellidae-simulation-and-visualization-of-current-and-future-distributions-along-the-eastern-afromontane
#9
Benignus V Ngowi, Henri E Z Tonnang, Evans M Mwangi, Tino Johansson, Janet Ambale, Paul N Ndegwa, Sevgan Subramanian
There is a scarcity of laboratory and field-based results showing the movement of the diamondback moth (DBM) Plutella xylostella (L.) across a spatial scale. We studied the population growth of the diamondback moth (DBM) Plutella xylostella (L.) under six constant temperatures, to understand and predict population changes along altitudinal gradients and under climate change scenarios. Non-linear functions were fitted to continuously model DBM development, mortality, longevity and oviposition. We compiled the best-fitted functions for each life stage to yield a phenology model, which we stochastically simulated to estimate the life table parameters...
2017: PloS One
https://www.readbyqxmd.com/read/28300183/simulated-herbivory-in-chickpea-causes-rapid-changes-in-defense-pathways-and-hormonal-transcription-networks-of-ja-ethylene-ga-auxin-within-minutes-of-wounding
#10
Saurabh Prakash Pandey, Shruti Srivastava, Ridhi Goel, Deepika Lakhwani, Priya Singh, Mehar Hasan Asif, Aniruddha P Sane
Chickpea (C. arietinum L.) is an important pulse crop in Asian and African countries that suffers significant yield losses due to attacks by insects like H. armigera. To obtain insights into early responses of chickpea to insect attack, a transcriptomic analysis of chickpea leaves just 20 minutes after simulated herbivory was performed, using oral secretions of H. armigera coupled with mechanical wounding. Expression profiles revealed differential regulation of 8.4% of the total leaf transcriptome with 1334 genes up-regulated and 501 down-regulated upon wounding at log2-fold change (|FC| ≤ -1 and ≥1) and FDR value ≤ 0...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28296068/assessment-of-insecticide-risk-to-human-health-in-groundwater-in-northern-china-by-using-the-china-pearl-model
#11
Yue Geng, Jing Ma, Ruize Zhou, Ran Jia, Chongjiu Li, Xiaodong Ma
BACKGROUND: Insecticides are extensively used in China and may leach to groundwater, which is used as a source of drinking water in Northern China. However, the risk of insecticide leaching to groundwater and the subsequent risk to human health caused by the consumption of insecticide-contaminated drinking water remain unclear. RESULTS: A total of 336 predicted environmental concentrations (PECs) were simulated for 32 commonly-used insecticides, and 171 PECs were calculated for 20 metabolites in 6 agricultural dry-land scenario locations of Northern China with 8 target crops...
March 15, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28287139/stage-specific-nonlinear-surface-ozone-damage-to-rice-production-in-china
#12
Colin A Carter, Xiaomeng Cui, Aijun Ding, Dalia Ghanem, Fei Jiang, Fujin Yi, Funing Zhong
China is one of the most heavily polluted nations and is also the largest agricultural producer. There are relatively few studies measuring the effects of pollution on crop yields in China, and most are based on experiments or simulation methods. We use observational data to study the impact of increased air pollution (surface ozone) on rice yields in Southeast China. We examine nonlinearities in the relationship between rice yields and ozone concentrations and find that an additional day with a maximum ozone concentration greater than 120 ppb is associated with a yield loss of 1...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28281063/agroforestry-a-sustainable-environmental-practice-for-carbon-sequestration-under-the-climate-change-scenarios-a-review
#13
Farhat Abbas, Hafiz Mohkum Hammad, Shah Fahad, Artemi Cerdà, Muhammad Rizwan, Wajid Farhad, Sana Ehsan, Hafiz Faiq Bakhat
Agroforestry is a sustainable land use system with a promising potential to sequester atmospheric carbon into soil. This system of land use distinguishes itself from the other systems, such as sole crop cultivation and afforestation on croplands only through its potential to sequester higher amounts of carbon (in the above- and belowground tree biomass) than the aforementioned two systems. According to Kyoto protocol, agroforestry is recognized as an afforestation activity that, in addition to sequestering carbon dioxide (CO2) to soil, conserves biodiversity, protects cropland, works as a windbreak, and provides food and feed to human and livestock, pollen for honey bees, wood for fuel, and timber for shelters construction...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28273815/development-of-an-unmanned-aerial-vehicle-borne-crop-growth-monitoring-system
#14
Jun Ni, Lili Yao, Jingchao Zhang, Weixing Cao, Yan Zhu, Xiuxiang Tai
In view of the demand for a low-cost, high-throughput method for the continuous acquisition of crop growth information, this study describes a crop-growth monitoring system which uses an unmanned aerial vehicle (UAV) as an operating platform. The system is capable of real-time online acquisition of various major indexes, e.g., the normalized difference vegetation index (NDVI) of the crop canopy, ratio vegetation index (RVI), leaf nitrogen accumulation (LNA), leaf area index (LAI), and leaf dry weight (LDW)...
March 3, 2017: Sensors
https://www.readbyqxmd.com/read/28273247/richness-and-density-of-aquatic-benthic-macroinvertebrates-after-exposure-to-fungicides-and-insecticides-in-rice-paddy-fields
#15
Alana C D Wandscheer, Enio Marchesan, Sandro Santos, Renato Zanella, Marília F Silva, Guilherme P Londero, Gabriel Donato
The objective of this study was to verify the richness and density of aquatic benthic macroinvertebrates after exposure to fungicides and insecticides of the rice paddy fields. In the crop seasons of 2012/13 and 2013/14, field experiments were performed, which consisted of single-dose applications of the fungicides trifloxystrobin + tebuconazole and tricyclazole, and the insecticides lambda-cyhalothrin + thiamethoxam and diflubenzuron, in 10 m2 experimental plots, over rice plants in the R3 stage. Control plots with and without rice plants were maintained in order to simulate a natural environment...
March 2, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28266137/development-of-groundwater-pesticide-exposure-modeling-scenarios-for-vulnerable-spring-and-winter-wheat-growing-areas
#16
Lauren Padilla, Michael Winchell, Natalia Peranginangin, Shanique Grant
Wheat crops and the major wheat-growing regions of the US are not included in the six crop and region specific scenarios developed by the Environmental Protection Agency (USEPA) for exposure modeling with the Pesticide Root Zone Model conceptualized for groundwater (PRZM-GW). This work augments the current scenarios by defining appropriately vulnerable PRZM-GW scenarios for high-producing spring and winter wheat growing regions that are appropriate for use in refined pesticide exposure assessments. Initial screening-level modeling was conducted for all wheat areas across the conterminous US as defined by multiple years of the Cropland Data Layer land use dataset...
March 7, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28247412/modification-and-application-of-an-in-vitro-assay-to-examine-inositol-phosphate-degradation-in-the-digestive-tract-of-poultry
#17
V Sommerfeld, M Schollenberger, L Hemberle, M Rodehutscord
BACKGROUND: An in vitro assay was modified to study inositol hexakisphosphate (InsP6 ) disappearance and the formation of lower inositol phosphate (InsP) isomers in the poultry digestive tract, and three experiments investigated the influence of diets with different ingredients and additives. Using the poultry diet as a matrix, the assay simulated the conditions (e.g., pH, temperature, proteolytic enzymes, water content, and retention time) of the crop, stomach, and small intestine, and extraction and analysis of InsP isomers were immediately conducted...
March 1, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28237845/fuzzy-logic-applied-to-prospecting-for-areas-for-installation-of-wood-panel-industries
#18
Alexandre Rosa Dos Santos, Ewerthon Mattos Paterlini, Nilton Cesar Fiedler, Carlos Antonio Alvares Soares Ribeiro, Alexandre Simões Lorenzon, Getulio Fonseca Domingues, Gustavo Eduardo Marcatti, Nero Lemos Martins de Castro, Thaisa Ribeiro Teixeira, Gleissy Mary Amaral Dino Alves Dos Santos, Ronie Silva Juvanhol, Elvis Ricardo Figueira Branco, Pedro Henrique Santos Mota, Lilianne Gomes da Silva, Daiani Bernardo Pirovani, Waldir Cintra de Jesus, Ana Carolina de Albuquerque Santos, Helio Garcia Leite, Setsuo Iwakiri
Prospecting for suitable areas for forestry operations, where the objective is a reduction in production and transportation costs, as well as the maximization of profits and available resources, constitutes an optimization problem. However, fuzzy logic is an alternative method for solving this problem. In the context of prospecting for suitable areas for the installation of wood panel industries, we propose applying fuzzy logic analysis for simulating the planting of different species and eucalyptus hybrids in Espírito Santo State, Brazil...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28229479/sampling-strategies-for-evaluating-the-rate-of-adventitious-transgene-presence-in-non-genetically-modified-crop-fields
#19
David Makowski, Rémi Bancal, Arnaud Bensadoun, Hervé Monod, Antoine Messéan
According to E.U. regulations, the maximum allowable rate of adventitious transgene presence in non-genetically modified (GM) crops is 0.9%. We compared four sampling methods for the detection of transgenic material in agricultural non-GM maize fields: random sampling, stratified sampling, random sampling + ratio reweighting, random sampling + regression reweighting. Random sampling involves simply sampling maize grains from different locations selected at random from the field concerned. The stratified and reweighting sampling methods make use of an auxiliary variable corresponding to the output of a gene-flow model (a zero-inflated Poisson model) simulating cross-pollination as a function of wind speed, wind direction, and distance to the closest GM maize field...
February 23, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28220874/modeling-contribution-of-shallow-groundwater-to-evapotranspiration-and-yield-of-maize-in-an-arid-area
#20
Xiaoyu Gao, Zailin Huo, Zhongyi Qu, Xu Xu, Guanhua Huang, Tammo S Steenhuis
Capillary rise from shallow groundwater can decrease the need for irrigation water. However, simple techniques do not exist to quantify the contribution of capillary flux to crop water use. In this study we develop the Agricultural Water Productivity Model for Shallow Groundwater (AWPM-SG) for calculating capillary fluxes from shallow groundwater using readily available data. The model combines an analytical solution of upward flux from groundwater with the EPIC crop growth model. AWPM-SG was calibrated and validated with 2-year lysimetric experiment with maize...
February 21, 2017: Scientific Reports
keyword
keyword
24722
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"